Remove break iterator support from the i18n api extension. It breaks

src/extensions/experimental/experimental.gyp

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 19 matching lines @@
     # TODO(cira): Find out how to pass this value for arbitrary embedder.
     # Chromium sets it in common.gypi and does force include of that file for
     # all sub projects.
     'icu_src_dir%': '../../../../third_party/icu',
   },
   'targets': [
     {
       'target_name': 'i18n_api',
       'type': 'static_library',
       'sources': [
-        'break-iterator.cc',
-        'break-iterator.h',
         'i18n-extension.cc',
         'i18n-extension.h',
       ],
       'include_dirs': [
         '<(icu_src_dir)/public/common',
         '../..',
       ],
       'dependencies': [
         '<(icu_src_dir)/icu.gyp:*',
         '../../../tools/gyp/v8.gyp:v8',
       ],
     },
   ],  # targets
 }